Twofish (cipher): Difference between revisions
Jump to navigation
Jump to search
imported>Sandy Harris m (Twofish moved to Twofish (cipher): consistent with other cipher naming) |
imported>Sandy Harris (subpages) |
||
| Line 1: | Line 1: | ||
{{subpages}} | |||
'''Twofish''' | '''Twofish''' | ||
<ref>{{citation | <ref>{{citation | ||
| Line 8: | Line 10: | ||
is a [[block cipher]] from [[Bruce Schneier]]'s company [[Counterpane]]. It was designed as a candidate cipher for the [[AES competition]], and was a finalist though not the winner. Like all candidates, it uses 128-bit blocks and supports key sizes of 128, 192 or 256 bits. It is a 16-round [[#Feistel structure | Feistel cipher]] using four key-dependent 8*8 S-boxes. | is a [[block cipher]] from [[Bruce Schneier]]'s company [[Counterpane]]. It was designed as a candidate cipher for the [[AES competition]], and was a finalist though not the winner. Like all candidates, it uses 128-bit blocks and supports key sizes of 128, 192 or 256 bits. It is a 16-round [[#Feistel structure | Feistel cipher]] using four key-dependent 8*8 S-boxes. | ||
Except for the name, it has little relationship to [[Blowfish (cipher)| Blowfish]]; Twofish was a new design. It has a successor named "Threefish", used in the [[Skein (hash algorithm) | Skein]] hash algorithm, a candidate in the [[Advanced Hash Standard]] contest. That is another new design. | Except for the name, and using key-dependent S-boxes, it has little relationship to [[Blowfish (cipher)| Blowfish]]; Twofish was a new design. It has a successor named "Threefish", used in the [[Skein (hash algorithm) | Skein]] hash algorithm, a candidate in the [[Advanced Hash Standard]] contest. That is another new design. | ||
The cipher is freely available for any use. It has a home page; see [[Block_cipher/External_Links#Homepages_for_block_ciphers | external links]]. | The cipher is freely available for any use. It has a home page; see [[Block_cipher/External_Links#Homepages_for_block_ciphers | external links]]. | ||
Revision as of 20:32, 30 September 2009
Twofish [1] is a block cipher from Bruce Schneier's company Counterpane. It was designed as a candidate cipher for the AES competition, and was a finalist though not the winner. Like all candidates, it uses 128-bit blocks and supports key sizes of 128, 192 or 256 bits. It is a 16-round Feistel cipher using four key-dependent 8*8 S-boxes.
Except for the name, and using key-dependent S-boxes, it has little relationship to Blowfish; Twofish was a new design. It has a successor named "Threefish", used in the Skein hash algorithm, a candidate in the Advanced Hash Standard contest. That is another new design.
The cipher is freely available for any use. It has a home page; see external links.
References
- ↑ Bruce Schneier, John Kelsey, Doug Whiting, David Wagner, Chris Hall, Niels Ferguson (1998), Twofish: A 128-Bit Block Cipher